with breaking news developments they will be there several law enforcement agencies could be looking at two potential suspects in the boston bombings, one at each blast site. president obama visited boston for an enter faith service to pay tribute to the victims of the bombings. today, a grieving city is trying to he. president obama and the first lady joined in an interfaith service dedicated to the victims of the bombing and offered support and encourage m our prayers are with the injured. we will be with you as you learn to stand, walk, and, yes, run again. >> the cathedral was packed with victims, first responders, government officials and members of the community. there were prayers for those recovering from injury and tears for the three people who died, 29-year-old krystle campbell, lu, a native of china and 8-year-old martin richard. tracy helped his younger sister who lost a young. >> if my daughter were injured like that, so badly injured and so scared but she was incredibly brave. >> sources tell use that the f.b.i. has images of two men both possible suspects. the best vi